Adaptive identification algorithm for PA´s digital predistortion

According to the nonlinear amplification with memory characteristic of power amplifier(PA) in WCDMA systems, the structure of digital predistorter and predistorter identification algorithm are analyzed. An adaptive identification algorithm for Wiener power amplifier model with memory is proposed. The method can avoid the local convergence problem of NG algorithm effectively. Moreover it has a very good suppression of signal spectral regrowth. Theoretical analysis and computer simulation have verified the effectiveness and practicability of the algorithm.